Reaction to Jeff Trawick's observations that we are double-initializing

  Reaction to Jeff Trawick's observations that we are double-initializing
  dynalinked OpenSSL Engines and Configs.  Move the library teardown code
  so that it is torn down in the proper order, corresponding to when the
  library itself was initialized.  And leave a little reminder that some
  memory diagnostics would be good if OpenSSL is built for malloc debugging.

Suggested by: Geoff Thorpe

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk/modules/ssl@100288 13f79535-47bb-0310-9956-ffa450edef68